Dial-holder.



PATENTED JUNE 4, 1907.

0. OHLSON.

` DIAL HOLDER.

APPLIOATION PILED JAN. e, 1906.

UNITED STATES PATENT OFFICE.

OLOF OHLSON, OF NEWVTON, MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGNMENT& TO VVALTHAM WVATOH COMPANY, A CORPORATION OF MASSACHUSETTS.

DlAL-HOLDER.

No. &356,092.

Patented June 4, 1907.

Application filed January 9, 1906. Serial No. 295.237.

TO all whom, it ntay concern:

Be it known that I, OLOF OHLSON, of Newton, in the' county of MiddleseX and State of Massachusetts, have invented certain new and useful Improvements in Dial-Holders, of which the following is a specification.

The present invention has for its object to provide an improved means for attaching which the figures are impressed, it is impracticable to aflix such posts and accordingly I have devised a holding means for dials which avoids the necessity of furnishing the posts and at the same time holds the dial more securely, and is a less expensive device.

The construction embodying my invention is illustrated in the accompanying drawings, in which,-

Figure l represents an elevation of the outer face of a pillar-plate having a dial applied thereto and secured by my novel securing means. Fig. 2 represents on an enlarged scale, a section on line 2-2 of Fig. 1. Fig. 3 represents a similar view, showing an enameled dial in place. Fig. 4 represents a perspective view of one of the dial-holding screws.

The same reference characters indicate the same parts in all the figures.

Referring to the drawings, a represents the pillar or bottom plate of a watch, which has on its outer side a shallow recess or depression b surrounded by an annular rim c. ithin the depression is set a dial dwhich as shown in Figs. 1 and 2 is of thin sheet metal and fits closely in the recess, its face being substantiallyflushwith the outer surface of the rim c.

In the edges or peripheral sides of the pillar plate are one or more tapped holes c, the outer portions of which are counter-bored to formenlarged recesses f which open into the edges of the recess b. ,Within the tapped holes are set screws g of which the heads h fit the large recesses f and project somewhat beyond the bottom of the recess I so that when the dial is in place and the screws are turned inwardly, the edges of their heads will bear against the edges of the dial. Each screw head IL is recessed on the side adjacent the shank, forming an annular groove t between the shank and edge of the head and forming upon 'the latter an annular fiange the inner side of which is beveled so as to produce a sharp edge. When the set-screw is serewed down with sufficient force, the sharp edge bites into the dial, the latter being of a softer metal than is the screw-head, and so holds the dial securely so that it cannot be removed until the set-screws are loosened. Fig. 3 illustrates how an enameled dial may be secured in the same manner. In this figure, d represents the dial and d and (Z layers of enamel on opposite faces thereof. The layer d on the under side of the dial does not ex tend quite to the circumference of the latter, but is instead set into a slight depression which is surrounded by a rim d* of metal. Thus the portion of the dial with which the holding screws come into contact is of metal and the latter can therefore engage the dial in the manner described above without obs truction by the enamel.

It will be seen that the screws are set radially of the pillarplate and that their shanks are substantially parallel with the dial and the surface of the dial recess I), their heads therefore eXtending perpendicularly to the dial. There are preferably three of such holding screws, and when they are all moved toward the center of the plate, they hold the dial with a radial pressure at three points, so that it is firnly held and displacement is impossible.

I claim 1. The combination with a plate for a time-piece having a flat dial-supporting surface and a fixed dial-positioning rim rising from said plate around the supporting surface, of a dial hearing against said surface, and holding screws arranged at intervals to project through said rim and engage the edges of the dial, the rim having an opening or openings through which the screw-head may project.

2. The combination of a plate for a timepiece having a circular recess in its outer face and holes in its sides opening partially into said recess, a dial fitting in said recess, and

screws set in said holes, the heads of the screws partially overlapping and bearng against the edges of the dial.

3. The combination of a plate for a timepiece having a recess in its outer side, a dial fitting in said recess, and screws set in the sides of the plate, the heads of said screws bearng against the edges of the dial and being formed With a sharp annular edge to bite into the dial and hold the same With a positive grip.

4. The combination of a plate for a timepiece having a depression in the outer face to receive a dial, and a screw set into the side or edge of the plate With its head projectng sornewhat beyond the bottom of said depression, the screw head having a sharp-edged annuiar ange to ndent and positiveiy hold a dial placed in said depression.

5. The combination of a plate for a timepiece, and a screw set into the side or edge of the plate With its head projecting someWhat beyond the bottom of said depression, the screw-head being annularly recessed on the side adjacent the shank to form a sharpedged peripheral flange 'for engaging the ed gc of a dial placed in the recess.

In testinony Whereof I have aHiXed my signature, in presence of two witnesses.

OLOF OHLSON.

YVitnesses:

HELEN A. MosnER. E. A. MARsH. I 

